Decanter Doppio is a wine decanter designed by Itamar Harari for the brand Zieher. When the wine is poured into the carafe, it splits into two layers, which not only provides an aesthetically pleasing visual effect, but also increases the oxygen supply to the wine thanks to a larger exposed surface. This two-part structure not only contributes to an aesthetic experience, but also plays a decisive role in the wine's development process. By dividing the wine on two levels, the contact surface with air is increased without taking up more space on the table, which makes oxygenation more efficient. Furthermore, this division is maintained throughout the pouring process, leading to a dramatic cascading effect that further intensifies the aeration. Doppio is skillfully manufactured in durable and easy-to-clean borosilicate glass. An optimal fill volume of 0.75 liters is recommended to maximize oxygen exposure and aesthetic effects.